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Figure 1 Representative horizontal and vertical long axes slices from the Tc-99m tetrofosmin (TETRO) and Tc-99m sestamibi (MIBI) stress (S) and rest (R) SPECT images of a 67-year-old female patient with a 50% stenosis of her mid left anterior descending coronary artery and 90% stenosis of the proximal left circumflex coronary artery. There are infero-apical and lateral defects in the Tc-99m sestamibi scan while the Tc-99m tetrofosmin scan is only mildly abnormal.
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